Way to get number of digits in an int?

Question

Is there a neater way for getting the number of digits in an int than this method?

int numDigits = String.valueOf(1000).length();

Answer 1

Using Java

int nDigits = Math.floor(Math.log10(Math.abs(the_integer))) + 1;

use import java.lang.Math.*; in the beginning

Using C

int nDigits = floor(log10(abs(the_integer))) + 1;

use inclue math.h in the beginning